FreeCalypso > hg > freecalypso-tools
annotate target-utils/libc/strlen.S @ 638:6562364b2033
loadagent: BINDUMP command implemented
author | Mychaela Falconia <falcon@freecalypso.org> |
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date | Sun, 01 Mar 2020 18:14:56 +0000 |
parents | 3670e7768ab6 |
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rev | line source |
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95
3670e7768ab6
target-utils/libc: strlen optimized assembly implementation added
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff
changeset
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1 .text |
3670e7768ab6
target-utils/libc: strlen optimized assembly implementation added
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff
changeset
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2 .code 32 |
3670e7768ab6
target-utils/libc: strlen optimized assembly implementation added
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff
changeset
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3 .globl strlen |
3670e7768ab6
target-utils/libc: strlen optimized assembly implementation added
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff
changeset
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4 strlen: |
3670e7768ab6
target-utils/libc: strlen optimized assembly implementation added
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff
changeset
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5 mov r1, r0 |
3670e7768ab6
target-utils/libc: strlen optimized assembly implementation added
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff
changeset
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6 1: ldrb r2, [r0], #1 |
3670e7768ab6
target-utils/libc: strlen optimized assembly implementation added
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff
changeset
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7 cmn r2, #0 |
3670e7768ab6
target-utils/libc: strlen optimized assembly implementation added
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff
changeset
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8 bne 1b |
3670e7768ab6
target-utils/libc: strlen optimized assembly implementation added
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff
changeset
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9 sbc r0, r0, r1 |
3670e7768ab6
target-utils/libc: strlen optimized assembly implementation added
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff
changeset
|
10 bx lr |